Welcome to the Ozeki VoIP SIP SDK Developers Guide! This guide offers practical and
detailed introduction and documentation for developing VoIP applications (softphones, webphones,
Flash solutions, etc.) using Ozeki VoIP SIP SDK. Ozeki SIP SDK saves you a great deal of
time and effort during development.
This guide explores the concepts behind VoIP, the framework for constructing an application
and the tools for developing.
The Developers Guide includes overall documentation for VoIP app development, except the
API reference book. For API specifications, please visit the API Reference Book page.